I have tried to translate the Replete theme by downloading and change the default .mo and .po file but I noticed later it did not contain any swedish translations. When I open the translation editor in codestyling localization no words were translated for neither replete or woocommerce. When I tried to add the language again I got a warning sign saying something is wrong with the file.

Please try to use Codestyling instead: http://wordpress.org/plugins/codestyling-localization/
Install the plugin, go to Tools > Localization and select “Themes”. Then search for “Replete” in the list and click on “Add new language”. Then select your language from the list and click the “create po-file” button. Click on “Rescan” to fetch all text strings. Then click on “Edit” and translate the required strings from the “avia_framework” textdomain. At least click the “create mo file” button next to the “Textdomain” selection dropdown (top left corner).

Thanks for your reply but that is exactly what I have been trying to do. I use Codestyling Localization but no words gets translated when I scan and I get this message:

Warning: The actual loaded translation content contains mixed textdomains and is not pure translateable within one textdomain.
It seems, that there is code contained extracted out of other plugins, themes or widgets and used by copy & paste inside some source files.
The affected unknown textdomains are: wordpress-importer, woothemes, woocommerce

Is there anything wrong with the translation or can I make some adjustements to make the import function better?

You are currently using Replete version 1.4.1. Please update it to the latest version 1.5. You should login on ThemeForest with the account you have purchased Replete theme and go to Downloads section to download the latest version. Let us know if issue remains after the update
For a quick guide on updating your theme take a look at this video on updating the theme via FTP: https://vimeo.com/channels/aviathemes/67209750

1) You must use the Swedish version of WordPress (see: http://sv.wordpress.org/ ) otherwise the Swedish translation file won’t load (even if everything is translated). As long as the admin panel is in English you’re using the English version of wordpress.

After you translated the string generate the mo file (generate mo file button). You just need to translate the avia_framework textdomain (already selected in the dropdown) and you can ignore the warning and the other text domains. If you’re ready with the translation please provide a link to the po fileand we’ll include it with the next update for all Replete users.

1) The reviews etc. are part of the woocommerce plugin and you can’t translate them with the theme files. You probably need to translate the plugin translation file ( /wp-content/plugins/woocommerce/i18n/languages/woocommerce-admin-sv_SE.po ) – use the Codestyling plugin to rescan and translate the woocommerce file.

1) Afaik you need to set the order on the WooCommerce > Settings > Catalog page (select “Default sorting (custom ordering + name)” in the dropdown field). If it doesn’t work try to use: http://wordpress.org/plugins/post-types-order/ or use the WooCommerce sort feature (Products > Sort Products tab).